US4801792A - Endoscope - Google Patents

Endoscope Download PDF

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Publication number
US4801792A
US4801792A US07/028,316 US2831687A US4801792A US 4801792 A US4801792 A US 4801792A US 2831687 A US2831687 A US 2831687A US 4801792 A US4801792 A US 4801792A
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Prior art keywords
objective lens
lens unit
light transmitting
stop
light
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Expired - Fee Related
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US07/028,316
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Nobuo Yamasita
Iwao Kanamori
Shinichiro Hattori
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Olympus Corp
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Olympus Optical Co Ltd
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/26Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes using light guides
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2407Optical details
    • G02B23/2461Illumination
    • G02B23/2469Illumination using optical fibres
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/005Diaphragms

Definitions

  • the present invention relates to endoscopes and more particularly to an optical system for endoscopes.
  • an endoscope incorporates an observing optical system comprising an objective lens and an image guide and an illuminating optical system comprising an illuminating lens and a light guide in the body thereof.
  • variation in the distance between the distal end portion of the body and the surface of an object brings about variations in the distance from the exit end face of the light guide to the surface of the object and the distance from the surface of the object to the entrance end face of the image guide.
  • brightness in the field of view will be rapidly changed.
  • the field of view is liable to be extremely illuminated and conversely when the object is viewed from a distance in some extent, the field of view tends to be dark in excess.
  • a primary object of the present invention is to provide an endoscope which is equipped with a stop capable of being incorporated in the body and which can moderate variations in brightness of a visual field in accordance with variations in the distance from the distal end portion of the body to the surface of an object.
  • a stop means composed of an annular electrochromic element is arranged in an objective lens unit so that the transmittance of the stop means can be varied depending on the amount of light coming from an object to be observed which has been measured. Thereby, the amount of light reaching the visual field is adjusted automatically in accordance with the distance from the distal end portion of the endoscope to the surface of the object.
  • FIG. 1 is a schematic view showing an embodiment of an optical system for endoscopes according to the present invention and a stop controlling circuit thereof;
  • FIG. 2 is a view showing a stop of the embodiment in FIG. 1 and characteristics thereof;
  • FIGS. 3A, 3B and 3C are diagrams showing variations of voltage in respective portions of the embodiment in FIG. 1;
  • FIG. 4 is a graph showing a working principle of the embodiment in FIG. 1;
  • FIG. 5 is a perspective view showing another example of a stop formation.
  • FIG. 6 is a schematic view showing another embodiment of an optical system for endoscopes according to the present invention.
  • FIG. 1 is a schematic view showing an optical system for endoscopes and a stop controlling circuit.
  • Reference numeral 1 denotes a light source, 2 a condenser lens, 3 a light guide and 4 an illuminating lens, which are arranged so that illuminating light emitted from the light source 1 is irradiated on the surface of an object O through the condenser lens 2, the light guide 3 and the illuminating lens 4.
  • reference numeral 5 represents an objective lens unit, 6 an image guide, 7 a beam splitter and 8 an eyepiece.
  • the stop 9 denotes a stop arranged in the objective lens unit 5, for example, at a focus position on the front side of the objective lens unit 5.
  • the stop 9 comprises an annular electrochromic element having an opening 9a at the center portion and an annular portion 9b which is formed so as to be in a transparent state (high transmittance level) or in a colored state (low transmittance level), depending on the direction of an applied voltage.
  • Numeral 10 denotes a photoelectric converting element to which a part of light of the object image relayed to the exit end face of the image guide is conducted after reflected by the beam splitter.
  • Numeral 11 represents an amplifier whose input terminal is connected to the photoelectric converting element 10
  • numeral 12 represents a comparator comprising a Schmitt circuit whose input terminal is connected to the output terminal of the amplifier 11 and whose output terminal is connected to the stop 9. They are arranged so that voltage generated at the photoelectric converting element 10 in accordance with the amount of incident light is amplified by the amplifier 11 and then is input to the comparator 12.
  • the stop controlling circuit which has the following working principle.
  • the amount of incident light of the objective lens unit 5 increases as the distance reduces, so that the voltage at point A of the amplifier 11 is gradually increased (see FIG. 3A).
  • the comparator 12 turns the voltage at a point C into negative (see FIG. 3C) and applies reverse voltage to the stop 9.
  • the annular portion 9b which has been already, for example, transparent is turned in a colored state, that is, the stop 9 is stopped down, with the result that the amount of incident light on the entrance end face 6a of the image guide 6 decreases. Consequently, the voltage at the point A will drop as shown in FIG. 3A.
  • the voltage at a point B is varied accordingly (see FIG. 3B).
  • the values of resistances R 1 , R 2 are previously selected in such a way that voltage B L which has been already varied is somewhat lower than the voltage at the point A in the case of stopping down the stop 9 (see FIG. 3A)
  • the stop 9 is maintained in the same state even if the distance between the object and the objective lens unit 5 (that is, the distal end portion of the endoscope) is more or less varied at the position and even when the objective lens unit 5 is closer to the object.
  • Reference numeral 13 denotes a driving circuit for the objective lens unit 5 which is connected to the output terminal of the comparator 12 and which moves the objective lens unit 5 to focus a near point when the output of the comparator 12 is negative and to focus a far point when it is positive.
  • the optical system for endoscopes is constituted as described above. That is, when the object O is provided at a far distance, since the amount of incident light from the objective lens unit 5 is reduced, the output of the comparator 12 is turned into positive upon the foregoing principle and the stop 9 is in an open state. Although the depth of field is small when the stop 9 is in an open state, the objective lens unit 5 is then moved to focus a far point by the objective driving circuit 13 and thereby, as shown in FIG. 4, the depth of field can be set to an appropriate depth l 1 which focuses a predetermined position at the far point.
  • the depth of field is large on the far point side when the stop 9 is in a stopped-down state, the objective lens unit 5 is then moved so as to focus a near point by the objective driving circuit 13 and therefore, as shown in FIG. 4, the depth of field can be set to an appropriate depth l 2 which focuses a predetermined position at the near point.
  • an aperture stop is controlled in accordance with brightness (that is, the distance to the object) and a focus position is simultaneously change, thereby combining properly variations of the depth of field caused by stop diameters and by the distances to the object with each other, as well as the control of brightness, to allow good observation over a wide range of the distance from the far point to the near point.
  • the depth of focus is given by the formula:
  • x 0 is the position of an object focused
  • x near is the depth of field at a near point
  • x far is the depth of field at a far point
  • F NO is F-number
  • f is the focal length of an objective lens
  • is the diameter of the circle of confusion.
  • the optical system for endoscopes allows the stop 9 to be incorporated in the endoscope by constructing it of an electrochromic element and causes the stop 9 to be opened or closed automatically in dependence of the distance between the object O and the objective lens unit 5, with the result that the variation of brightness in the field of view corresponding to variation in the distance to the object is moderated and an endoscope which is very convenient for use can be constituted. Further, a proper depth of field can always be maintained independently of the distance to the object O.
  • the stop 9 is a single-stage stop
  • the embodiment is formed so that the transmittance of the stop 9 is varied stepwise.
  • the applied voltage of the stop 9 alternates positive and negative states and its ratio is changed to thereby enable the transmittance to be continuously varied.
  • the stop 9 it is favorable to be placed at the front focus position of the objective lens unit in the case of fiber scopes or electronic scopes, whereas in nonflexible endoscopes, the stop 9 may be arranged, in addition to the front focus position of the objective lens unit, at the pupil position of the image transmitting system, as shown by symbols A and A' in FIG. 6, and the exit pupil position of the eyepiece. Further, if the light amount adjustment of the light source 1 and the automatic sensitivity adjustment on the side of a TV camera to be provided in the rear of the eyepiece 8 are combined with the stop control and the focus adjustment, better photographs and TV picture images with proper brightness can be secured.
  • the photoelectric converting element 10 for measuring the brightness of an object to be photographed may be arranged at the front end face of the endoscope body, the periphery in front of the stop 9 and the end face, on the side of the light source 1, of a fiber bundle made up with the light guide 3, besides the arrangement shown in the foregoing embodiment.
  • arrangement may be made so that a signal for brightness is directly taken out thereof.

Abstract

An endoscope provided with a stop comprising an annular electrochromic element arranged in an objective lens unit so that the transmittance of the stop is varied in accordance with the amount of light from an object to be observed which has been measured, in order to prevent brightness in a field of view from being rapidly changed when the distance from the distal end portion of the endoscope to the object to be observed is varied.

Description

BACKGROUND OF THE INVENTION
(a) FIELD OF THE INVENTION
The present invention relates to endoscopes and more particularly to an optical system for endoscopes.
(b) DESCRIPTION OF THE PRIOR ART
Generally, an endoscope incorporates an observing optical system comprising an objective lens and an image guide and an illuminating optical system comprising an illuminating lens and a light guide in the body thereof. In such an endoscope, variation in the distance between the distal end portion of the body and the surface of an object brings about variations in the distance from the exit end face of the light guide to the surface of the object and the distance from the surface of the object to the entrance end face of the image guide. When the distances are varied as mentioned above, brightness in the field of view will be rapidly changed. Usually, therefore, when the object is observed from a short distance, the field of view is liable to be extremely illuminated and conversely when the object is viewed from a distance in some extent, the field of view tends to be dark in excess.
Thus, in order to solve this problem, consideration has been given to provide a stop in the above optical system. However, it has been impossible to incorporate a conventional stop mechanically constituted, which is large in size, in the body of an endoscope.
SUMMARY OF THE INVENTION
In view of the above circumstances, a primary object of the present invention is to provide an endoscope which is equipped with a stop capable of being incorporated in the body and which can moderate variations in brightness of a visual field in accordance with variations in the distance from the distal end portion of the body to the surface of an object.
According to the present invention, a stop means composed of an annular electrochromic element is arranged in an objective lens unit so that the transmittance of the stop means can be varied depending on the amount of light coming from an object to be observed which has been measured. Thereby, the amount of light reaching the visual field is adjusted automatically in accordance with the distance from the distal end portion of the endoscope to the surface of the object.
This and other objects as well as the features and the advantages of the present invention will be apparent from the following detailed description of the preferred embodiment when taken in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic view showing an embodiment of an optical system for endoscopes according to the present invention and a stop controlling circuit thereof;
FIG. 2 is a view showing a stop of the embodiment in FIG. 1 and characteristics thereof;
FIGS. 3A, 3B and 3C are diagrams showing variations of voltage in respective portions of the embodiment in FIG. 1;
FIG. 4 is a graph showing a working principle of the embodiment in FIG. 1;
FIG. 5 is a perspective view showing another example of a stop formation; and
FIG. 6 is a schematic view showing another embodiment of an optical system for endoscopes according to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The present invention will hereunder be explained in detail with respect to an embodiment shown in the drawings. FIG. 1 is a schematic view showing an optical system for endoscopes and a stop controlling circuit. Reference numeral 1 denotes a light source, 2 a condenser lens, 3 a light guide and 4 an illuminating lens, which are arranged so that illuminating light emitted from the light source 1 is irradiated on the surface of an object O through the condenser lens 2, the light guide 3 and the illuminating lens 4. Further, reference numeral 5 represents an objective lens unit, 6 an image guide, 7 a beam splitter and 8 an eyepiece. These optical components are arranged so that the image of the object O is formed onto an entrance end face 6a of the image guide 6 through the objective lens unit 5, is relayed to an exit end face 6b of the image guide 6, and is observed through the eyepiece 8 after transmitting the beam splitter 7. Numeral 9 denotes a stop arranged in the objective lens unit 5, for example, at a focus position on the front side of the objective lens unit 5. As shown in FIG. 2, the stop 9 comprises an annular electrochromic element having an opening 9a at the center portion and an annular portion 9b which is formed so as to be in a transparent state (high transmittance level) or in a colored state (low transmittance level), depending on the direction of an applied voltage. Numeral 10 denotes a photoelectric converting element to which a part of light of the object image relayed to the exit end face of the image guide is conducted after reflected by the beam splitter. Numeral 11 represents an amplifier whose input terminal is connected to the photoelectric converting element 10, and numeral 12 represents a comparator comprising a Schmitt circuit whose input terminal is connected to the output terminal of the amplifier 11 and whose output terminal is connected to the stop 9. They are arranged so that voltage generated at the photoelectric converting element 10 in accordance with the amount of incident light is amplified by the amplifier 11 and then is input to the comparator 12.
Those components mentioned above constitute the stop controlling circuit, which has the following working principle. When the object O approaches toward the objective lens unit 5 from a far distance in an open state of the stop 9, that is, in a transparent state of the annular portion 9b, the amount of incident light of the objective lens unit 5 increases as the distance reduces, so that the voltage at point A of the amplifier 11 is gradually increased (see FIG. 3A). Further, when the increase of the voltage at the point A exceeds a threshold level of reference voltage BH, the comparator 12 turns the voltage at a point C into negative (see FIG. 3C) and applies reverse voltage to the stop 9. Therefore, the annular portion 9b which has been already, for example, transparent is turned in a colored state, that is, the stop 9 is stopped down, with the result that the amount of incident light on the entrance end face 6a of the image guide 6 decreases. Consequently, the voltage at the point A will drop as shown in FIG. 3A. In the Schmitt circuit, when the voltage at the point C is reversed, the voltage at a point B is varied accordingly (see FIG. 3B). However, if the values of resistances R1, R2 are previously selected in such a way that voltage BL which has been already varied is somewhat lower than the voltage at the point A in the case of stopping down the stop 9 (see FIG. 3A), the stop 9 is maintained in the same state even if the distance between the object and the objective lens unit 5 (that is, the distal end portion of the endoscope) is more or less varied at the position and even when the objective lens unit 5 is closer to the object.
Conversely, when the object is a short distance with respect to the objective lens unit in a state that the stop 9 is stopped down, and the distance then increases the voltage at the point A is gradually decreased. Further, when this voltage is reduced to be lower than the voltage BL, the comparator 12 turns the voltage at the point C into positive (see FIG. 3C). Consequently, the annular portion 9b of the stop 9 is changed from a colored state to a transparent state, that is, the stop 9 is opened. Although the voltage at the point A is then raised as a result of the fact that the amount of incident light from the objective lens unit 5 is increased, the voltage at the point A remains lower than the voltage BH since the voltage BL is set as mentioned above (see FIG. 3A) and the state of the stop 9 is likewise stable.
Reference numeral 13 denotes a driving circuit for the objective lens unit 5 which is connected to the output terminal of the comparator 12 and which moves the objective lens unit 5 to focus a near point when the output of the comparator 12 is negative and to focus a far point when it is positive.
The optical system for endoscopes according to the present invention is constituted as described above. That is, when the object O is provided at a far distance, since the amount of incident light from the objective lens unit 5 is reduced, the output of the comparator 12 is turned into positive upon the foregoing principle and the stop 9 is in an open state. Although the depth of field is small when the stop 9 is in an open state, the objective lens unit 5 is then moved to focus a far point by the objective driving circuit 13 and thereby, as shown in FIG. 4, the depth of field can be set to an appropriate depth l1 which focuses a predetermined position at the far point.
On the other hand, when the object O is located at a short distance, since the amount of incident light is increased, the output of the comparator 12 becomes negative and the stop 9 is in a stopped-down state. Although the depth of field is large on the far point side when the stop 9 is in a stopped-down state, the objective lens unit 5 is then moved so as to focus a near point by the objective driving circuit 13 and therefore, as shown in FIG. 4, the depth of field can be set to an appropriate depth l2 which focuses a predetermined position at the near point.
As described above, an aperture stop is controlled in accordance with brightness (that is, the distance to the object) and a focus position is simultaneously change, thereby combining properly variations of the depth of field caused by stop diameters and by the distances to the object with each other, as well as the control of brightness, to allow good observation over a wide range of the distance from the far point to the near point.
Also, in endoscopes, when the position of the objective lens unit 5 is shifted by, for example, a manually operated wire, a precise control of the lens position becomes difficult due to the slack of the wire and the like caused by the deflection of the endoscope body. For this reason, it is preferable in practical use to introduce the conception of a so-called zone focus to adopt a system of shifting stepwise the position of the objective lens unit 5 in accordance with the variations of the stop 9 as mentioned above.
Also, when the stop is provided at the front focus position of the objective lens unit, the depth of focus is given by the formula:
1/x.sub.0 -1/x.sub.far =1/x.sub.near -1/x.sub.0 =F.sub.NO /f.sup.2 φ
where x0 is the position of an object focused, xnear is the depth of field at a near point, xfar is the depth of field at a far point, FNO is F-number, f is the focal length of an objective lens, and φ is the diameter of the circle of confusion.
As stated above, the optical system for endoscopes according to the present invention allows the stop 9 to be incorporated in the endoscope by constructing it of an electrochromic element and causes the stop 9 to be opened or closed automatically in dependence of the distance between the object O and the objective lens unit 5, with the result that the variation of brightness in the field of view corresponding to variation in the distance to the object is moderated and an endoscope which is very convenient for use can be constituted. Further, a proper depth of field can always be maintained independently of the distance to the object O.
Although the above-mentioned embodiment shows the stop 9 to be a single-stage stop, the use of a stop comprising two or more electrochromic elements arranged along an optical axis, as shown in FIG. 5, allows a stop with two stages or more. Further, the embodiment is formed so that the transmittance of the stop 9 is varied stepwise. However, the applied voltage of the stop 9 alternates positive and negative states and its ratio is changed to thereby enable the transmittance to be continuously varied. Moreover, it is possible to maintain constantly the transmittance by holding evenly the ratio.
Also, for the stop 9, it is favorable to be placed at the front focus position of the objective lens unit in the case of fiber scopes or electronic scopes, whereas in nonflexible endoscopes, the stop 9 may be arranged, in addition to the front focus position of the objective lens unit, at the pupil position of the image transmitting system, as shown by symbols A and A' in FIG. 6, and the exit pupil position of the eyepiece. Further, if the light amount adjustment of the light source 1 and the automatic sensitivity adjustment on the side of a TV camera to be provided in the rear of the eyepiece 8 are combined with the stop control and the focus adjustment, better photographs and TV picture images with proper brightness can be secured. In addition, the photoelectric converting element 10 for measuring the brightness of an object to be photographed may be arranged at the front end face of the endoscope body, the periphery in front of the stop 9 and the end face, on the side of the light source 1, of a fiber bundle made up with the light guide 3, besides the arrangement shown in the foregoing embodiment. Also, in the case of using a pickup tube as in a TV or an image pickup device instead of the image transmitting optical system, arrangement may be made so that a signal for brightness is directly taken out thereof.

Claims (7)

What is claimed is:
1. An endoscope that uses an illuminating device to emit light from a distal portion of said endoscope onto an area of a object to be observed and an objective lens unit to focus an image of said area on a predetermined image forming surface comprising:
an electro-optical stop means disposed in said objective lens unit for changing an amount of light that strikes said predetermined image forming surface to obtain a proper depth of field and brightness, said stop means including:
a light transmitting section of a predetermined size disposed along an optical axis of said objective lens unit, and
a variable light transmitting section that surrounds said light transmitting section and is capable of changing alternatively to one of a light transmitting state and a light interrupting state;
a photoelectric converting means that receives at least a portion of said light incident on said objective lens unit for generating a signal representative of said portion of said incident light; and
control means respective to said signal for controlling said stop means with an output signal so that said variable light transmitting section is in said light interrupting state when a distance between said object and said distal portion is short and a value of said signal is larger than a predetermined value and said variable light transmitting section is in said light transmitting state when said distance is far and said value of said signal is lesser than said predetermined value.
2. An endoscope according to claim 1 wherein said stop means is made from an electrochromic material.
3. An endoscope according to claim 1 or 2 wherein said light transmitting section of said stop means has a circular from and said variable section has an annular form.
4. An endoscope according to claim 1 or 2 wherein said objective lens unit includes a plurality of relay lenses for image transmission are arranged in a rear section of said objective lens unit and said stop means is provided in said plurality of relay lenses.
5. An endoscope according to claim 1 or 2 wherein said variable light transmitting section includes a first variable section having an annular form and a second variable section having an annular form concentric with said first variable section and having a size that surrounds an outer diameter of said first variable section.
6. An endoscope according to claim 1 or 2, wherein said endoscope further includes a driving means connected to said control means for moving said objective lens unit in focus, said objective lens unit being moved in focus in accordance with a variation of said output signal from said control means.
7. An endoscope according to claim 1 or 2, wherein said photoelectric converting means is an image pickup device.
US07/028,316 1986-03-22 1987-03-20 Endoscope Expired - Fee Related US4801792A (en)

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JP61064592A JPS62220918A (en) 1986-03-22 1986-03-22 Endoscope optical system
JP61-64592 1986-03-22

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US10123684B2 (en) 2014-12-18 2018-11-13 Endochoice, Inc. System and method for processing video images generated by a multiple viewing elements endoscope
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US10376181B2 (en) 2015-02-17 2019-08-13 Endochoice, Inc. System for detecting the location of an endoscopic device during a medical procedure
US10401611B2 (en) 2015-04-27 2019-09-03 Endochoice, Inc. Endoscope with integrated measurement of distance to objects of interest
US10488648B2 (en) 2016-02-24 2019-11-26 Endochoice, Inc. Circuit board assembly for a multiple viewing element endoscope using CMOS sensors
US10499794B2 (en) 2013-05-09 2019-12-10 Endochoice, Inc. Operational interface in a multi-viewing element endoscope
US10516865B2 (en) 2015-05-17 2019-12-24 Endochoice, Inc. Endoscopic image enhancement using contrast limited adaptive histogram equalization (CLAHE) implemented in a processor
US10517464B2 (en) 2011-02-07 2019-12-31 Endochoice, Inc. Multi-element cover for a multi-camera endoscope
US10524645B2 (en) 2009-06-18 2020-01-07 Endochoice, Inc. Method and system for eliminating image motion blur in a multiple viewing elements endoscope
US10542877B2 (en) 2014-08-29 2020-01-28 Endochoice, Inc. Systems and methods for varying stiffness of an endoscopic insertion tube
US10595714B2 (en) 2013-03-28 2020-03-24 Endochoice, Inc. Multi-jet controller for an endoscope
US10663714B2 (en) 2010-10-28 2020-05-26 Endochoice, Inc. Optical system for an endoscope
US10898062B2 (en) 2015-11-24 2021-01-26 Endochoice, Inc. Disposable air/water and suction valves for an endoscope
US10993605B2 (en) 2016-06-21 2021-05-04 Endochoice, Inc. Endoscope system with multiple connection interfaces to interface with different video data signal sources
US11082598B2 (en) 2014-01-22 2021-08-03 Endochoice, Inc. Image capture and video processing systems and methods for multiple viewing element endoscopes
US11163169B2 (en) 2016-06-07 2021-11-02 Karl Storz Se & Co. Kg Endoscope and imaging arrangement providing improved depth of field and resolution
US11234581B2 (en) 2014-05-02 2022-02-01 Endochoice, Inc. Elevator for directing medical tool
US11278190B2 (en) 2009-06-18 2022-03-22 Endochoice, Inc. Multi-viewing element endoscope
DE102021106836A1 (en) 2020-10-02 2022-04-07 Karl Storz Se & Co. Kg Optical filter system for a video endoscope, display system and video endoscope
US11307430B2 (en) 2016-06-07 2022-04-19 Karl Storz Se & Co. Kg Optical device and method for providing improved depth of field and resolution modes
US20220151472A1 (en) * 2020-11-13 2022-05-19 Sony Olympus Medical Solutions Inc. Medical control device and medical observation system
US11529197B2 (en) 2015-10-28 2022-12-20 Endochoice, Inc. Device and method for tracking the position of an endoscope within a patient's body
US11547275B2 (en) 2009-06-18 2023-01-10 Endochoice, Inc. Compact multi-viewing element endoscope system
DE102021132233A1 (en) 2021-12-08 2023-06-15 Karl Storz Se & Co. Kg Optical filter for an objective system of an endoscope, objective system and endoscope
WO2023227259A1 (en) * 2022-05-24 2023-11-30 Steiner-Optik Gmbh Long-range optical device
US11864734B2 (en) 2009-06-18 2024-01-09 Endochoice, Inc. Multi-camera endoscope
US11889986B2 (en) 2010-12-09 2024-02-06 Endochoice, Inc. Flexible electronic circuit board for a multi-camera endoscope

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01131512A (en) * 1987-11-17 1989-05-24 Olympus Optical Co Ltd Endoscope device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4313663A (en) * 1978-04-18 1982-02-02 Agfa-Gevaert Ag Electrooptic diaphragm and circuit operative for causing the diaphragm to open up stepwise and then close to terminate exposure
US4333720A (en) * 1979-06-14 1982-06-08 Canon Kabushiki Kaisha Stop control device
US4340811A (en) * 1979-06-12 1982-07-20 Olympus Optical Co., Ltd. Focusing method and apparatus for use in an optical system
US4678900A (en) * 1984-07-05 1987-07-07 Olympus Optical Co., Ltd. Illuminating optical system for endoscopes
US4704520A (en) * 1984-05-02 1987-11-03 Olympus Optical Co., Ltd. Light source device for an endoscope

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4313663A (en) * 1978-04-18 1982-02-02 Agfa-Gevaert Ag Electrooptic diaphragm and circuit operative for causing the diaphragm to open up stepwise and then close to terminate exposure
US4340811A (en) * 1979-06-12 1982-07-20 Olympus Optical Co., Ltd. Focusing method and apparatus for use in an optical system
US4333720A (en) * 1979-06-14 1982-06-08 Canon Kabushiki Kaisha Stop control device
US4704520A (en) * 1984-05-02 1987-11-03 Olympus Optical Co., Ltd. Light source device for an endoscope
US4678900A (en) * 1984-07-05 1987-07-07 Olympus Optical Co., Ltd. Illuminating optical system for endoscopes

Cited By (118)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10092167B2 (en) 2009-06-18 2018-10-09 Endochoice, Inc. Multiple viewing elements endoscope system with modular imaging units
US9706903B2 (en) 2009-06-18 2017-07-18 Endochoice, Inc. Multiple viewing elements endoscope system with modular imaging units
US9101268B2 (en) 2009-06-18 2015-08-11 Endochoice Innovation Center Ltd. Multi-camera endoscope
US10799095B2 (en) 2009-06-18 2020-10-13 Endochoice, Inc. Multi-viewing element endoscope
US10791910B2 (en) 2009-06-18 2020-10-06 Endochoice, Inc. Multiple viewing elements endoscope system with modular imaging units
US11547275B2 (en) 2009-06-18 2023-01-10 Endochoice, Inc. Compact multi-viewing element endoscope system
US10791909B2 (en) 2009-06-18 2020-10-06 Endochoice, Inc. Image capture assembly for use in a multi-viewing elements endoscope
US10765305B2 (en) 2009-06-18 2020-09-08 Endochoice, Inc. Circuit board assembly of a multiple viewing elements endoscope
US9474440B2 (en) 2009-06-18 2016-10-25 Endochoice, Inc. Endoscope tip position visual indicator and heat management system
US9492063B2 (en) 2009-06-18 2016-11-15 Endochoice Innovation Center Ltd. Multi-viewing element endoscope
US10638922B2 (en) 2009-06-18 2020-05-05 Endochoice, Inc. Multi-camera endoscope
US9554692B2 (en) 2009-06-18 2017-01-31 EndoChoice Innovation Ctr. Ltd. Multi-camera endoscope
US11534056B2 (en) 2009-06-18 2022-12-27 Endochoice, Inc. Multi-camera endoscope
US10905320B2 (en) 2009-06-18 2021-02-02 Endochoice, Inc. Multi-camera endoscope
US9642513B2 (en) 2009-06-18 2017-05-09 Endochoice Inc. Compact multi-viewing element endoscope system
US10561308B2 (en) 2009-06-18 2020-02-18 Endochoice, Inc. Systems and methods for regulating temperature and illumination intensity at the distal tip of an endoscope
US10912454B2 (en) 2009-06-18 2021-02-09 Endochoice, Inc. Systems and methods for regulating temperature and illumination intensity at the distal tip of an endoscope
US10130246B2 (en) 2009-06-18 2018-11-20 Endochoice, Inc. Systems and methods for regulating temperature and illumination intensity at the distal tip of an endoscope
US10524645B2 (en) 2009-06-18 2020-01-07 Endochoice, Inc. Method and system for eliminating image motion blur in a multiple viewing elements endoscope
US9706905B2 (en) 2009-06-18 2017-07-18 Endochoice Innovation Center Ltd. Multi-camera endoscope
US9713417B2 (en) 2009-06-18 2017-07-25 Endochoice, Inc. Image capture assembly for use in a multi-viewing elements endoscope
US10912445B2 (en) 2009-06-18 2021-02-09 Endochoice, Inc. Compact multi-viewing element endoscope system
US11278190B2 (en) 2009-06-18 2022-03-22 Endochoice, Inc. Multi-viewing element endoscope
US11471028B2 (en) 2009-06-18 2022-10-18 Endochoice, Inc. Circuit board assembly of a multiple viewing elements endoscope
US9872609B2 (en) 2009-06-18 2018-01-23 Endochoice Innovation Center Ltd. Multi-camera endoscope
US9901244B2 (en) 2009-06-18 2018-02-27 Endochoice, Inc. Circuit board assembly of a multiple viewing elements endoscope
US9907462B2 (en) 2009-06-18 2018-03-06 Endochoice, Inc. Endoscope tip position visual indicator and heat management system
US10165929B2 (en) 2009-06-18 2019-01-01 Endochoice, Inc. Compact multi-viewing element endoscope system
US11864734B2 (en) 2009-06-18 2024-01-09 Endochoice, Inc. Multi-camera endoscope
US20110270092A1 (en) * 2010-01-29 2011-11-03 Korea Electrotechnology Research Institute Combined apparatus for detection of multispectral optical image emitted from living body and for light therapy
US10080486B2 (en) 2010-09-20 2018-09-25 Endochoice Innovation Center Ltd. Multi-camera endoscope having fluid channels
US9986892B2 (en) 2010-09-20 2018-06-05 Endochoice, Inc. Operational interface in a multi-viewing element endoscope
US9560953B2 (en) 2010-09-20 2017-02-07 Endochoice, Inc. Operational interface in a multi-viewing element endoscope
US10412290B2 (en) 2010-10-28 2019-09-10 Endochoice, Inc. Image capture and video processing systems and methods for multiple viewing element endoscopes
US20130296649A1 (en) * 2010-10-28 2013-11-07 Peer Medical Ltd. Optical Systems for Multi-Sensor Endoscopes
US10663714B2 (en) 2010-10-28 2020-05-26 Endochoice, Inc. Optical system for an endoscope
US20170023787A1 (en) * 2010-10-28 2017-01-26 Endochoice Innovation Center Ltd. Optical Systems for Multi-Sensor Endoscopes
US9706908B2 (en) 2010-10-28 2017-07-18 Endochoice, Inc. Image capture and video processing systems and methods for multiple viewing element endoscopes
US11543646B2 (en) * 2010-10-28 2023-01-03 Endochoice, Inc. Optical systems for multi-sensor endoscopes
US20190121118A1 (en) * 2010-10-28 2019-04-25 Endochoice Innovation Center Ltd. Optical systems for multi-sensor endoscopes
US10203493B2 (en) * 2010-10-28 2019-02-12 Endochoice Innovation Center Ltd. Optical systems for multi-sensor endoscopes
US9814374B2 (en) 2010-12-09 2017-11-14 Endochoice Innovation Center Ltd. Flexible electronic circuit board for a multi-camera endoscope
US10182707B2 (en) 2010-12-09 2019-01-22 Endochoice Innovation Center Ltd. Fluid channeling component of a multi-camera endoscope
US10898063B2 (en) 2010-12-09 2021-01-26 Endochoice, Inc. Flexible electronic circuit board for a multi camera endoscope
US11889986B2 (en) 2010-12-09 2024-02-06 Endochoice, Inc. Flexible electronic circuit board for a multi-camera endoscope
US11497388B2 (en) 2010-12-09 2022-11-15 Endochoice, Inc. Flexible electronic circuit board for a multi-camera endoscope
US9320419B2 (en) 2010-12-09 2016-04-26 Endochoice Innovation Center Ltd. Fluid channeling component of a multi-camera endoscope
US10779707B2 (en) 2011-02-07 2020-09-22 Endochoice, Inc. Multi-element cover for a multi-camera endoscope
US9351629B2 (en) 2011-02-07 2016-05-31 Endochoice Innovation Center Ltd. Multi-element cover for a multi-camera endoscope
US10070774B2 (en) 2011-02-07 2018-09-11 Endochoice Innovation Center Ltd. Multi-element cover for a multi-camera endoscope
US10517464B2 (en) 2011-02-07 2019-12-31 Endochoice, Inc. Multi-element cover for a multi-camera endoscope
US9713415B2 (en) 2011-03-07 2017-07-25 Endochoice Innovation Center Ltd. Multi camera endoscope having a side service channel
US11026566B2 (en) 2011-03-07 2021-06-08 Endochoice, Inc. Multi camera endoscope assembly having multiple working channels
US9854959B2 (en) 2011-03-07 2018-01-02 Endochoice Innovation Center Ltd. Multi camera endoscope assembly having multiple working channels
US9402533B2 (en) 2011-03-07 2016-08-02 Endochoice Innovation Center Ltd. Endoscope circuit board assembly
US10292578B2 (en) 2011-03-07 2019-05-21 Endochoice Innovation Center Ltd. Multi camera endoscope assembly having multiple working channels
US9655502B2 (en) 2011-12-13 2017-05-23 EndoChoice Innovation Center, Ltd. Removable tip endoscope
US10470649B2 (en) 2011-12-13 2019-11-12 Endochoice, Inc. Removable tip endoscope
US9314147B2 (en) 2011-12-13 2016-04-19 Endochoice Innovation Center Ltd. Rotatable connector for an endoscope
US11291357B2 (en) 2011-12-13 2022-04-05 Endochoice, Inc. Removable tip endoscope
US9560954B2 (en) 2012-07-24 2017-02-07 Endochoice, Inc. Connector for use with endoscope
US10925471B2 (en) 2013-03-28 2021-02-23 Endochoice, Inc. Fluid distribution device for a multiple viewing elements endoscope
US10595714B2 (en) 2013-03-28 2020-03-24 Endochoice, Inc. Multi-jet controller for an endoscope
US11793393B2 (en) 2013-03-28 2023-10-24 Endochoice, Inc. Manifold for a multiple viewing elements endoscope
US11375885B2 (en) 2013-03-28 2022-07-05 Endochoice Inc. Multi-jet controller for an endoscope
US9993142B2 (en) 2013-03-28 2018-06-12 Endochoice, Inc. Fluid distribution device for a multiple viewing elements endoscope
US10905315B2 (en) 2013-03-28 2021-02-02 Endochoice, Inc. Manifold for a multiple viewing elements endoscope
US9986899B2 (en) 2013-03-28 2018-06-05 Endochoice, Inc. Manifold for a multiple viewing elements endoscope
US11925323B2 (en) 2013-03-28 2024-03-12 Endochoice, Inc. Fluid distribution device for a multiple viewing elements endoscope
US9667935B2 (en) 2013-05-07 2017-05-30 Endochoice, Inc. White balance enclosure for use with a multi-viewing elements endoscope
US10205925B2 (en) 2013-05-07 2019-02-12 Endochoice, Inc. White balance enclosure for use with a multi-viewing elements endoscope
US10499794B2 (en) 2013-05-09 2019-12-10 Endochoice, Inc. Operational interface in a multi-viewing element endoscope
US9949623B2 (en) 2013-05-17 2018-04-24 Endochoice, Inc. Endoscope control unit with braking system
US10433715B2 (en) 2013-05-17 2019-10-08 Endochoice, Inc. Endoscope control unit with braking system
US11229351B2 (en) 2013-05-17 2022-01-25 Endochoice, Inc. Endoscope control unit with braking system
US10105039B2 (en) 2013-06-28 2018-10-23 Endochoice, Inc. Multi-jet distributor for an endoscope
US10064541B2 (en) 2013-08-12 2018-09-04 Endochoice, Inc. Endoscope connector cover detection and warning system
US9943218B2 (en) 2013-10-01 2018-04-17 Endochoice, Inc. Endoscope having a supply cable attached thereto
US9968242B2 (en) 2013-12-18 2018-05-15 Endochoice, Inc. Suction control unit for an endoscope having two working channels
US11082598B2 (en) 2014-01-22 2021-08-03 Endochoice, Inc. Image capture and video processing systems and methods for multiple viewing element endoscopes
US20150253643A1 (en) * 2014-03-05 2015-09-10 Qioptiq Limited Optical assembly
US11234581B2 (en) 2014-05-02 2022-02-01 Endochoice, Inc. Elevator for directing medical tool
US10258222B2 (en) 2014-07-21 2019-04-16 Endochoice, Inc. Multi-focal, multi-camera endoscope systems
US11229348B2 (en) 2014-07-21 2022-01-25 Endochoice, Inc. Multi-focal, multi-camera endoscope systems
US11883004B2 (en) 2014-07-21 2024-01-30 Endochoice, Inc. Multi-focal, multi-camera endoscope systems
US10542877B2 (en) 2014-08-29 2020-01-28 Endochoice, Inc. Systems and methods for varying stiffness of an endoscopic insertion tube
US11771310B2 (en) 2014-08-29 2023-10-03 Endochoice, Inc. Systems and methods for varying stiffness of an endoscopic insertion tube
US10123684B2 (en) 2014-12-18 2018-11-13 Endochoice, Inc. System and method for processing video images generated by a multiple viewing elements endoscope
US10271713B2 (en) 2015-01-05 2019-04-30 Endochoice, Inc. Tubed manifold of a multiple viewing elements endoscope
US11147469B2 (en) 2015-02-17 2021-10-19 Endochoice, Inc. System for detecting the location of an endoscopic device during a medical procedure
US10376181B2 (en) 2015-02-17 2019-08-13 Endochoice, Inc. System for detecting the location of an endoscopic device during a medical procedure
US11194151B2 (en) 2015-03-18 2021-12-07 Endochoice, Inc. Systems and methods for image magnification using relative movement between an image sensor and a lens assembly
US10634900B2 (en) 2015-03-18 2020-04-28 Endochoice, Inc. Systems and methods for image magnification using relative movement between an image sensor and a lens assembly
US10078207B2 (en) 2015-03-18 2018-09-18 Endochoice, Inc. Systems and methods for image magnification using relative movement between an image sensor and a lens assembly
US10401611B2 (en) 2015-04-27 2019-09-03 Endochoice, Inc. Endoscope with integrated measurement of distance to objects of interest
US11555997B2 (en) 2015-04-27 2023-01-17 Endochoice, Inc. Endoscope with integrated measurement of distance to objects of interest
US11330238B2 (en) 2015-05-17 2022-05-10 Endochoice, Inc. Endoscopic image enhancement using contrast limited adaptive histogram equalization (CLAHE) implemented in a processor
US11750782B2 (en) 2015-05-17 2023-09-05 Endochoice, Inc. Endoscopic image enhancement using contrast limited adaptive histogram equalization (CLAHE) implemented in a processor
US10516865B2 (en) 2015-05-17 2019-12-24 Endochoice, Inc. Endoscopic image enhancement using contrast limited adaptive histogram equalization (CLAHE) implemented in a processor
US10791308B2 (en) 2015-05-17 2020-09-29 Endochoice, Inc. Endoscopic image enhancement using contrast limited adaptive histogram equalization (CLAHE) implemented in a processor
US11529197B2 (en) 2015-10-28 2022-12-20 Endochoice, Inc. Device and method for tracking the position of an endoscope within a patient's body
US11311181B2 (en) 2015-11-24 2022-04-26 Endochoice, Inc. Disposable air/water and suction valves for an endoscope
US10898062B2 (en) 2015-11-24 2021-01-26 Endochoice, Inc. Disposable air/water and suction valves for an endoscope
US11782259B2 (en) 2016-02-24 2023-10-10 Endochoice, Inc. Circuit board assembly for a multiple viewing elements endoscope using CMOS sensors
US10488648B2 (en) 2016-02-24 2019-11-26 Endochoice, Inc. Circuit board assembly for a multiple viewing element endoscope using CMOS sensors
US10908407B2 (en) 2016-02-24 2021-02-02 Endochoice, Inc. Circuit board assembly for a multiple viewing elements endoscope using CMOS sensors
US10292570B2 (en) 2016-03-14 2019-05-21 Endochoice, Inc. System and method for guiding and tracking a region of interest using an endoscope
US11163169B2 (en) 2016-06-07 2021-11-02 Karl Storz Se & Co. Kg Endoscope and imaging arrangement providing improved depth of field and resolution
US11307430B2 (en) 2016-06-07 2022-04-19 Karl Storz Se & Co. Kg Optical device and method for providing improved depth of field and resolution modes
US11672407B2 (en) 2016-06-21 2023-06-13 Endochoice, Inc. Endoscope system with multiple connection interfaces to interface with different video data signal sources
US10993605B2 (en) 2016-06-21 2021-05-04 Endochoice, Inc. Endoscope system with multiple connection interfaces to interface with different video data signal sources
EP3988007A3 (en) * 2020-10-02 2022-07-06 Karl Storz SE & Co. KG Optical filter system for a video endoscope, display system and video endoscope
EP3988007A2 (en) 2020-10-02 2022-04-27 Karl Storz SE & Co. KG Optical filter system for a video endoscope, display system and video endoscope
DE102021106836A1 (en) 2020-10-02 2022-04-07 Karl Storz Se & Co. Kg Optical filter system for a video endoscope, display system and video endoscope
US11771308B2 (en) * 2020-11-13 2023-10-03 Sony Olympus Medical Solutions Inc. Medical control device and medical observation system
US20220151472A1 (en) * 2020-11-13 2022-05-19 Sony Olympus Medical Solutions Inc. Medical control device and medical observation system
DE102021132233A1 (en) 2021-12-08 2023-06-15 Karl Storz Se & Co. Kg Optical filter for an objective system of an endoscope, objective system and endoscope
WO2023227259A1 (en) * 2022-05-24 2023-11-30 Steiner-Optik Gmbh Long-range optical device

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